Originally Posted by Kalle

I actually had a look at the different gearsets that are (according to my research) optimal with the current itemisation. I computed a gain of ~69 dps (or 1.30%) if you need 3% less hit.

As you already said, the only other place you could spend the affliction talent points is (if not threat-capped) fel concentration. Because of lacking an estimate of fel concentration's worth I will simply assume that it cancels with the reduced mana cost you also get from supression and concentrate on destruction talents ;-)

Candidates for the additional points in the destruction tree are isb and molten core (and maybe eradication if you didn't take 3 points there).

Eradication:
There seems to be some dispute on what is the correct way to calculate the time between procs. I'll use iCD+dt*(1/p -1), where dt is the time between corruption ticks and p the procchance. So:
1/3 2.35% increased casting speed
2/3 3.44% increased casting speed
3/3 4.21% increased casting speed
As eradication is multiplicative with haste and reduced casting time results in more time to cast your filler spell, that's an increase of 2.35/3.44/4.21% of your filler dps. According to simulationcraft, filler dps (= sb+ds) is 45% of your total dps, so we're looking at an overall increase of 1.06/1.55/1.89%

ISB:
Well, that's difficult. It's quite likely that you cannot cast four sbs before the debuff expires. That's why I'll again use data from simulationcraft: With 40.8% destro crit, it computes that 72% of the spells benefit from isb. So we have an increase of 1.44% of your direct shodow damage (= sb+haunt) per point. Direct shadow damage is (using simcraft results again) 31% of your total dps, so we get an overall increase of 0.45% per talent point. But since from 25% HP you don't cast sbs anymore (ignoring nightfall), we have to multiply with ~0.79 (according to our latest wws it took 79% of the length of the fight to get patchwerk to 25% HP) and get 0.35%.

Molten Core:
We can't use the same formula as with eradication because as mc's internal CD is shorter than the duration of the buff (it has no CD), it can proc again before the old buff has expired. At any point in time, the chance that the debuff is up is equal to the chance that there was at least one proc in the last 12s. So we need to know the (average) amount of effects in 12s that can proc mc. This time I use results from the "Dots and you"-thread. It states that you can cast 15.26 sbs per minute in addition to recasting DoTs+haunt. So that's approx. 30 CoA ticks, 20 corruption ticks, 20 UA ticks, 20 siphon life ticks, ~6 haunts and 15.26 sbs per minute, or 22.25 shadow damage effects in 12s. I assume immolate is casted only before 25% HP because thats what simcraft does by default and I don't know if drain soul procs mc. MC uptime:
1/3 1-0.95^22.25 = 68.02%
2/3 1-0.9^22.25 = 90.41%
3/3 1-0.85^22.25 = 97.31%
Using simcraft again, immolate (glyphed, but not using it <25% HP) is 6% of your total dps, so we get an overall increase of 0.41/0.54/0.58%.

I'll call the dps you do with this spec 'base_dps'. It has eight points left which can be distributed between isb, mc, cataclysm and eradication (which already has one). I call the number of points in mc 'm', in isb 'i' and in cataclysm 'c'. The dps will be (ignoring reduction of mana cost from cataclysm):
dps = base_dps*[1+c*0.013/3]*[1+i*0.0035]*[1+(m>2)?0.0058m>1)?0.0054m>0)?0.0041:0]*[1+(8-c-i-m>2)?0.01898-c-i-m>1)?0.01558-c-i-m>0)?0.0106:0]
using the ternary conditional operator a?b:c, that evaluates to b if a is true and to c if a is false (sorry, can't think of a better way to write this). I get the maximum dps with 1/3 molten core, 2/5 isb, 3/3 cataclysm and 2/3 eradication.

Feel free to point out all the errors/bad assumptions I've made. The differences to the previous posts seems to be caused by different mc&isb uptimes.

Originally Posted by Boevis

Being specced for KotJ, I time Barkskin with Enrage to partly offset the loss in armor on a few bosses. Malygos and Sartharion I use Barkskin on Breaths (alternating as many cooldowns as possible with my healers for S+3). On KT I save barkskin for possible Iceblocks, Pre-web wrap on Maexxna, Enraged Grand Widow, Loatheb's Dooms, and I can take a 6th Mark if necessary on 4H. Basically, if a fight has a high Burst Damage ability that you can accurately use Barkskin to diminish (be it a cast time ability, or simply known from Bigwigs/DBM timers) you should do so, simply using it every cooldown can result in a wipe if you're ignoring a big burst (I can't stress the use of it on KT's Iceblocks enough if your melee are idiots) and many of these abilities occur close to 1m timer anyway (Doom, Marks, Enrage) , so once you get used to using Barkskin to get through the first one, using it on cooldown after that practically guarantees you'll get the rest of the abilities.

Originally Posted by Starfire

You don't need a 4th tank, you just need a Damage-dealer of a tanking class that can taunt and pop cooldowns. Fury Warrior, Arms Warrior, Retribution Paladin, Unholy Death Knight, Feral Druid.

Originally Posted by marano

To make this thread somewhat legible I'll summarize some aspects after a few more resplies.

Originally Posted by Valhalla

the 8% is the melee hit cap, not spell hit cap. The Spell hit cap isn't as important for blood specs, but for frost and unholy it does. If you have 8% hit unbuffed, it will only help you in the long run.